Reznor RDDA Operating instructions

Brand: Reznor

Model: RDDA

Type: Operating instructions

This manual is also suitable for

RDCA

Form CP-MAPS II-GC (01-15), P/N 209417R4, Page 1

Applies to: Gas Heat Section Sizes 100, 150, 200, 250,

and 300 on MAPS

II Model RDCA and Model RDDA

Form CP-MAPS II-GC (01-15)

Obsoletes Form CP-MAPS II-GC (Version A)

All gas conversion must be done by a qualied service person in accordance with

these instructions and in compliance with all codes and requirements. In Canada, gas

conversion shall be carried out in accordance with the requirements of the Provincial

Authorities having jurisdiction and in accordance with the requirements of the CAN/

CGA-B149.1 and .2 installation code.

WARNING

Improper installation, adjustment, alteration, service, or

maintenance can cause property damage, injury, or death.

For assistance or additional information, consult a qualied

installer, service agency, or the gas supplier.

Application and Kit

Selection

HAZARD INTENSITY LEVELS of Warnings

1. DANGER: Failure to comply will result in severe personal injury or death

and/or property damage.

2. WARNING: Failure to comply could result in severe personal injury or

death and/or property damage.

3. CAUTION: Failure to comply could result in minor personal injury and/or

property damage.

The gas conversion kits in these instructions are for an optional heat section (Sizes

100-300) of MAPS

II Model RDCA packaged cooling/heating and MAPS

II Model

RDDA cooling/reheat/heating systems. (NOTE: For converting larger heat section

sizes, contact the factory service department.)

Natural gas heat sections have either three-stage heating or modulating heating con-

trol. Propane fueled heat sections are only available in three-stage heating.

Verify that the kit being used is the appropriate one for the installation.

Comply with all warnings and follow the instructions carefully.

Components - Gas

Conversion Kits for

MAPS

II Models

RDCA and RDDA

with Gas Heat

Sizes 100 - 300

Gas Conversion Kits and Instructions

TABLE 1A - Natural Gas TO Propane Conversion Kits (NOTE: If equipped with Option AG57, 6:1 modulating gas

control, modulation must be disabled before gas conversion. Follow instructions on page 2.)

Gas Section Capacity (MBH) / Size 100 150 200 250 300

Conversion Kit P/N 269845

Description of Component Qty P/N Marking P/N Marking P/N Marking P/N Marking P/N Marking

Gas Orice for small burner section 1 205862 1.7 mm 124967 2.1 196852 #39 196853 #37 205720 2.9 mm

Gas Orice for larger burner section 1 205859 3/32 205860 2.9 mm 205716 3.3 mm 205717 3.75 mm 205718 4.1 mm

Gas Valve Conversion Spring Kit 2 98720, Honeywell #393691, for VR8105, VR8205, & VR8305 Single-Stage Valves

Gas Valve Conversion Spring Kit 2 260605, Honeywell #396221 for a VR8215 Single-Stage Valve (replacement valve)

Propane Conversion Disk 1 37752

Sheetmetal Screw (for attaching disk) 1 11813

Conversion Kit Tape 1 64391 (ll out and adhere near to heat section rating plate)

High Altitude Adjustment Label 1 197062 - Use if elevation is above 2000 ft (610M).

TABLE 1B - Propane TO Natural Gas Conversion Kits (3-stage system only)

Gas Section Capacity (MBH) / Size 100 150 200 250 300

Conversion Kit P/N 269859 209418 209419

Description of Component Qty P/N Marking P/N Marking P/N Marking P/N Marking P/N Marking

Gas Orice for small burner section 1 205863 2.75mm 120146 3.4mm 120152 #23 205719 4.4MM 120158 #10

Gas Orice for larger burner section 1 205857 #23 205858 #12 205713 7/32 205714 6.2MM 205715 6.9MM

Gas Valve Conversion Spring Kit 2 98721, Honeywell #394588, for VR8105, VR8205, & VR8305 Single-Stage Valves

Gas Valve Conversion Spring Kit 2 261651, Honeywell #396222 for a VR8215 Single-Stage Valve (replacement valve)

Secondary Combustion Air Restrictor 2 N/A 205492 205493

Natural Gas Conversion Disk 1 1401

Sheetmetal Screw (for attaching disk) 1 11813

Sheetmetal Screws (for restrictors) 8 N/A 11813

Conversion Kit Tape 1 64391 (ll out and adhere near to heat section rating plate)

High Altitude Adjustment Label 1 197062 - Use if elevation is above 2000 ft (610M).



Form CP-MAPS II-GC (01-15), P/N 209417R4, Page 2

Instructions apply to all sizes unless noted.

1. Turn off the external gas supply valve to the heater. Turn off the electric power

supply to unit (turn disconnect switch to OFF).

Remove the heat section access panel and open the electrical box on the side of

the unit.

2. Locate the burner orices and remove them from the brass adapter ttings. (Use

two wrenches to prevent rotation of the gas valve.) See FIGURE 2.

Preparation for

Conversion FROM

Natural Gas with

Option AG57, 6:1

Turndown Modulating

Gas Control TO

Propane

When converting a heat section equipped with a natural gas modulating control to pro-

pane gas, the modulation feature must be disabled. To disable the modulation feature

complete the ve steps below:

1. Turn off the external gas supply valve to the heater and turn off the power supply

the unit (turn disconnect switch to OFF).

2. Open the door to the electrical box on the side of the unit. Between terminal No. 60

and the 40 VA conditioner transformer, locate the 2.5 amp fuse. Remove and dis-

card the fuse.

3. Remove and discard the red wires from terminal Nos. 63 and 64 and the

modulating gas valve.

Conversion FROM

Natural Gas TO

Propane or FROM

Propane TO Natural

Gas -- applies to

heat section with 3-

stage heating or with

modulation disabled

FIGURE 2 - Gas

Orices

Gas Orice - There are two

burners. Orices sizes are

different. Check the size and

match the threads with the

adapter. Use two wrenches to

remove and replace orices.

5. Proceed to the instructions below for

conversion of a heater with three-stage burner

control.

3. Using the orices in the conversion kit, follow

these instructions.

NOTE that there are different sizes of orices.

Match the pipe threads of the orice to the

brass adapter thread and verify that the size

stamped on the orice matches the specied

size (See TABLE 1A or 1B on page 1).

Install both orices. Use two wrenches to

prevent rotation of the gas valve.

Tighten securely but do not over tighten.

(NOTE: When the

conversion is complete, the

propane fueled heat section

will function with three

stages of heating.)

DANGER

The conversion kit is to be selected and installed by a qualied

service person in accordance with these instructions and in

compliance with all codes and requirements of authorities having

jurisdiction. Failure to follow instructions could result in death,

serious injury and/or property damage. The qualied agency

performing this work assumes responsibility for this conversion.

Gas Conversion

Instructions

Check kit contents for agreement with the parts list and the size of heat section being serviced.

Conversion of a unit using these kits will not alter the input rate. Refer to the rating plate on the heater for input rate and

other appropriate information. (NOTE: If adjusted for high altitude operation, input rate will be affected; for high altitude

input ratings and capacities refer to TABLE 3 on page 4.)

4. Remove the modulating gas valve and replace

with eld-supplied black iron pipe.

FIGURE 1-

Modulating Gas Valve

on Natural Gas Unit

with Option AG57

Remove Maxitrol Modulating

Gas Valve

4. Combustion Air Restrictors - Sizes 250 and 300 only

If you are converting units that have either a 250 or a 300 mbh heat section

from natural gas to propane, the secondary combustion air restrictors must be

Form CP-MAPS II-GC (01-15), P/N 209417R4, Page 3

removed. If converting from propane to natural gas, the secondary combustion

air restrictors must be added. See the illustrations in FIGURE 3 showing the

locations of the upper and lower secondary air restrictors.

Restrictors are attached with screws. Either remove or add as required.

FIGURE 3 - Secondary

Air Restrictors on

Heat Section Sizes

250 and 300

5. Install Spring Kits - One at a time, remove the regulator adjustment spring from

each of the combination gas valves and replace with the appropriate Honeywell

Spring Kit (See component list on page 1 to verify spring kit application. Correct

spring kit must be used). Follow the instructions included with the spring kit.

6. Adjust Gas Valve Outlet Pressure -To adjust the gas valves to their proper

outlet pressure (see TABLE 2), both sections of the burner must be operating. To

facilitate operation without interruption from the system controller, the controller

must be overridden. Follow these steps to override the controller:

a) Place the remotely located OFF/AUTO control switch in the “OFF” position.

b) In the electrical box, remove the yellow wire from terminal No.10 and place a

jumper between terminal Nos. 8 and 10. (This will cause the blower to operate

when the electric supply is established.)

c) Place a jumper between terminal Nos. 40 and 42.

d) Place a jumper between terminal Nos. 40 and 43.

e) Prepare a jumper for placement between terminal Nos. 12 and 14. Do not put

the jumper in place until you are ready to adjust the gas valves. (Jumpering

terminals No. 12 and 14 will energize the heat section.)

7. Turn on the gas supply and the electric supply.

8. Put the jumper on terminals No. 12 and 14. This will initiate a “call for heat” and

when the start-up sequence is completed, both sections of the burner will be

operating.

9. After the burner has “red”, check for gas leaks using a leak detecting solution. If

a leak is found, for safety purposes, correct the leak before proceeding.

10. Using a uid-lled manometer, with both burner sections operating, check to be

certain that the inlet gas pressure is correct for the unit being converted. (The

inlet gas pressure may be checked at the inlet gas pressure tap of either gas

valve. See FIGURE 4.) Do not proceed until the inlet gas pressure is within

the correct pressure range. Natural gas pressure must be 5.5” to 14” w.c. and

propane pressure must be 11” to 14” w.c.

11. With both burner sections operating, adjust the outlet gas pressure of each

combination gas valve as specied in TABLE 2, page 4. Connect a uid-lled

manometer to measure the outlet gas pressure (See FIGURE 4 left). Adjust

pressure adjustment screw as required. Cycle the gas valves several times to

ensure the outlet pressure is correct. (A convenient way to cycle the gas valves

is to remove one of the valve wires momentarily.

CAUTION: DO NOT bottom out the gas valve regulator adjusting

screw. This can result in unregulated manifold pressure causing

excess overre and heat exchanger failure.

Check the outlet pressure of each valve. The turned-off burner section will relight

from the operating section.)

Lower Secondary

Air Restrictor

Upper

Secondary Air

Restrictor

1/8” Output

Pressure

Tap

Inlet Pressure Tap

Pressure

Adjustment

Screw

FIGURE 4 - View of

Single-Stage Valves

showing Outlet

Pressure Tap and

Adjustment Locations

Remove

or add both upper

and lower restrictors.

1/8” Outlet

Pressure

Tap

Inlet

Pressure

Tap

Adjust Outlet Pressure

Form CP-MAPS II-GC (01-15), P/N 209417R4, Page 4

www.ReznorHVAC.com; (800) 695-1901

Trademark Notes: Reznor

, TCORE

2®

, and are registered in at least the United

States. All other trademarks are the property of their respective owners.

Form CP-MAPS II-GC (Version 01-15)

Gas Conversion

Instructions

(cont’d)

TABLE 2 - Valve Outlet Pressure Settings by Altitude

FIGURE 5 - Attach the

Gas Conversion Disk

Gas conversion disk

attached to heater’s

header panel.

TABLE 3 - BTUH Inputs and Capacities by Altitude

12. Remove all wire jumpers and reconnect the yellow wire to terminal No. 10.

13. Use permanent ink to ll in the necessary information on the Conversion Kit Tape.

Include both orice sizes on the tape. Place the tape in a conspicuous location

inside the heat section.

If the unit is located at an altitude above 2000 feet, ll out the High Altitude

Adjustment Label. See TABLE 3. Adhere label near the heat section rating plate.

14. Attach the gas conversion disk. See FIGURE 5 (left).

15. Adhere the gas valve conversion stickers supplied with the Honeywell kit to the

gas valves.

The unit is ready to place into service. Check for proper operation.

Altitude Natural Gas Propane

Feet Meters Outlet Pressure of Single Stage Valves at FULL RATE

Manifold Pressure Settings by Altitude for the UNITED STATES

0-2000 0-610 3.5” w.c. 10.0” w.c.

2001-3000 611-915 3.1” w.c. 8.8” w.c.

3001-4000 916-1220 3.0” w.c. 8.5” w.c.

4001-5000 1221-1525 2.8” w.c. 8.1” w.c.

5001-6000 1526-1830 2.7” w.c. 7.7” w.c.

6001-7000 1831-2135 2.6” w.c. 7.4” w.c.

7001-8000 2136-2440 2.5” w.c. 7.1” w.c.

8001-9000 2441-2745 2.4” w.c. 6.7” w.c.

9001-10000 2746-3045 2.3” w.c. 6.7” w.c.

Manifold Pressure Settings by Altitude for CANADA

0-2000 0-610 3.5” w.c. 10.0” w.c.

2001-4500 611-1373 2.8” w.c. 8.1” w.c.

BTUH Inputs and Capacities by Altitude in the UNITED STATES for Optional Heat Section

ALTITUDE

Normal

Input

Thermal Output

Capacity

Minimum

Input

Normal

Input

Thermal Output

Capacity

Minimum

Input

Normal

Input

Thermal Output

Capacity

Minimum

Input

Feet Meters Size 100 Size 150 Size 200

0-2000 0-610 100000 83000 70000 150000 124500 105000 200000 166000 140000

2001-3000 611-915 94000 78020 65800 141000 117030 98700 188000 156040 131600

3001-4000 916-1220 92000 76360 64400 138000 114540 96600 184000 152720 128800

4001-5000 1221-1525 90000 74700 63000 135000 112050 94500 180000 149400 126000

5001-6000 1526-1830 88000 73040 61600 132000 109560 92400 176000 146080 123200

6001-7000 1831-2135 86000 71380 60200 129000 107070 90300 172000 142760 120400

7001-8000 2136-2440 84000 69720 58800 126000 104580 88200 168000 139440 117600

8001-9000 2441-2745 82000 68060 57400 123000 102090 86100 164000 136120 114800

9001-10000 2746-3045 80000 66400 56000 120000 99600 84000 160000 132800 112000

Feet Meters Size 250 Size 300

0-2000 0-610 250000 207500 175000 300000 249000 210000

2001-3000 611-915 235000 195050 164500 282000 234060 197400

3001-4000 916-1220 230000 190900 161000 276000 229080 193200

4001-5000 1221-1525 225000 186750 157500 270000 224100 189000

5001-6000 1526-1830 220000 182600 154000 264000 219120 184800

6001-7000 1831-2135 215000 178450 150500 258000 214140 180600

7001-8000 2136-2440 210000 174300 147000 252000 209160 176400

8001-9000 2441-2745 205000 170150 143500 246000 204180 172200

9001-10000 2746-3045 200000 166000 140000 240000 199200 168000

BTUH Inputs and Capacities by Altitude in CANADA for Optional Heat Section

ALTITUDE

Normal

Input

Thermal Output

Capacity

Minimum

Input

Normal

Input

Thermal Output

Capacity

Minimum

Input

Normal

Input

Thermal Output

Capacity

Minimum

Input

Feet Meters Size 100 Size 150 Size 200

0-2000 0-610 100000 83000 70000 150000 124500 105000 200000 166000 140000

2001-4500 611-1373 90000 74700 63000 135000 113400 94500 180000 151200 126000

Feet Meters Size 250 Size 300

0-2000 0-610 250000 207500 175000 300000 249000 210000

2001-4500 611-1373 225000 189000 157500 270000 226800 189000



Reznor RDDA Operating instructions

Brand: Reznor

Model: RDDA

Type: Operating instructions

This manual is also suitable for

RDCA

Download PDF

report

Reznor RDDA Operating instructions

This manual is also suitable for

Reznor RDDA Operating instructions

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